# std::time_put

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< cpp‎ | locale

Defined in header `<locale>` |  |
template< class CharT, class OutputIt = std::ostreambuf_iterator<CharT> > class time_put; |  |

Class template `std::time_put` encapsulates date and time formatting rules. The I/O manipulator std::put_time uses the `std::time_put` facet of the I/O stream's locale to generate text representation of an std::tm object.

Inheritance diagram

If a `std::time_put` specialization is not guaranteed to be provided by the standard library (see below), the behaviors of its put() and do_put() are not guaranteed as specified.

### Specializations

The standard library is guaranteed to provide the following specializations (they are required to be implemented by any locale object):

Defined in header `<locale>`
std::time_put<char> | creates narrow string representations of date and time
std::time_put<wchar_t> | creates wide string representations of date and time

In addition, the standard library is also guaranteed to provide every specialization that satisfies the following type requirements:

- `CharT` is one of char and wchar_t, and
- `OutputIt` must meet the requirements of LegacyOutputIterator.

### Nested types

Type | Definition
`char_type` | `CharT`
`iter_type` | `OutputIt`

### Data members

Member | Description
std::locale::id `id` [static] | the identifier of the facet

### Member functions

(constructor) | constructs a new `time_put` facet (public member function)
(destructor) | destructs a `time_put` facet (protected member function)
put | invokes `do_put` (public member function)

### Protected member functions

do_put [virtual] | formats date/time and writes to output stream (virtual protected member function)

### Example

Run this code

    #include <codecvt>
    #include <ctime>
    #include <iomanip>
    #include <iostream>

    int main()
    {
        std::time_t t = std::time(nullptr);
        std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv(std::cout.rdbuf());
        std::wostream out(&conv);
        out.imbue(std::locale("ja_JP.utf8"));

        // this I/O manipulator std::put_time uses std::time_put<wchar_t>
        out << std::put_time(std::localtime(&t), L"%A %c") << '\n';
    }

Output:

    水曜日 2011年11月09日 12時32分05秒

### See also

time_put_byname | represents the system-supplied std::time_put for the named locale (class template)
time_get | parses time/date values from an input character sequence into std::tm (class template)
put_time (C++11) | formats and outputs a date/time value according to the specified format (function template)

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